/**
 * Created by sccy on 2019/7/30/0030.
 */
public class Invoker {
    private Command command;
    public Invoker(Command command) {
        this.command = command;
    }
    public void setCommand(Command command) {
        this.command = command;
    }
    public void call(){
        System.out.println("调用者执行命令command");
        command.execute();
    }
}
